dog w/ AT-AT costume: acts as if the costume is part of him/her, couldn't care less about the costume being on him/her really...

cat w/ AT-AT costume: puts up some big WTF 0_0 eyes and freaks out, starts running and flailing it's paws around like a bloody moron and continues it untill it breaks it's paws or untill the costume is off.

Yes that ecstatic wiggly doggy goodness sure looks like we should all be sorry for him.
I'm just waiting for one of those 'animal lovers' who complain about cats being tortured in flash games to drop by.